Bobbin lock



P 14, 1948- w. J. VAILLANCOURT 2,449,258

BOBBIN LOCK Filed Sept. 11, 1946 I N VEN TOR.

WLLfTcl ivaluancourt Patented Sept. 14, 1948 UNITED STATES PATENT OFFICE.

2,449,258 BOBBIN LOCK Wilfred J. Vaillancourt, Fall River, Mass.

Application September 11, 1946, Serial No. 696,304

1 Claim.

This invention appertains to a bobbin lock and particularly to one especially designed for use on the Draper type rayon loom, it having for its primary object to prevent the bobbins from rolling relatively to the battery disc on which they are mounted, which movement is detrimental to a proper takeoff oi the threads and ordinarily occurs, in the absence of a locking medium, due to vibrations set up in the battery disc during loom operation.

Another object of the invention has to do with the provision of a locking device which will efficiently accomplish the above stated purpose and has the advantages of being extremely simple in construction and design, inexpensive to manufacture, and easy to install.

With these objects and advantages in view, th invention resides in the certain new and useful construction and arrangement, as will be hereinafter more fully described, set forth in the appended claims, and illustrated in the accompanying drawings, wherein:

Figure 1 is a side view of a fragment of a battery disc, showing the locks mounted thereon in cooperative relation with the bobbins, in accordance with the invention;

Figure 2 is an enlarged cross-section, taken through the line 22 on Figure 1, with the head end of a bobbin and an associated locking device in side elevation; and,

Figure 3 is an enlarged front side elevation of the locking device per se.

Referring to the drawings in detail, A designates the battery disc of a Draper type of rayon loom and B the bobbins mounted on the periphery of the disc in the usual manner. During the operation of the loom, vibrations are set up in the battery disc A and cause the bobbins B to roll relatively to the disc, with the result that the desired uniformity in the takeofi of threads therefrom is seriously interferred with, unless a means is provided to restrain the bobbins against such motion.

The present invention provides for such a means and, as illustrated in the drawings, is comprised in a substantially V-shaped member which is preferably made from a single length of a suitable spring stock, such as piano wire or the like,

Number bent medially of its ends to form an eye in for its attachment, by means of a screw or the like I6, to a side of the battery disc A; each member employed being positioned on the battery disc in a manner to have its arms I! bear on the sides of the head ends of adjacent weft carriers or bobbins B, substantially as shown in Figure 1, the free ends of the arms being curved slightly inward at their points of contact with the bobbin surfaces, as at M, to prevent any gouging or marring of the latter by such ends. With the arms I2 given a proper spread, an efficient frictional contact will be provided for between the same and the opposed surfaces of the bobbins B to insure against the aforesaid objectionable roll and possible breakage of the threads as they are drawn off from the bobbins.

What I claim is:

In a rotary magazine for weft replenishing looms, a bobbin carrying disc, V-s'hapedspring elements having screw attaching eyes at the vertexes thereof with outwardly extending arms having inwardly curved ends and wherein the arms are urged outwardly by spring tension of the elements, said V-shaped spring elements being mounted on the inner surface of the disc adjacent the periphery thereof and positioned midway between the heads of the bobbins carried thereby, whereby outward pressure of the arms holds the arms in frictional engagement with the heads of adjacent bobbins to prevent rolling thereof.

WILFRED J. VAILLANCOURT.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date Cunnifi Apr. 3, 1906 Draper May 19, 1908 Stimpson July 25, 1911 FOREIGN PATENTS Country Date France May 6, 1928 Number 

